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IP-Aliasing:

============

IP-aliases are additional IP-adresses/masks hooked up to a base

interface by adding a colon and a string when running ifconfig.

This string is usually numeric, but this is not a must.

IP-Aliases are avail if CONFIG_INET (`standard' IPv4 networking)

is configured in the kernel.

o Alias creation.

  Alias creation is done by 'magic' interface naming: eg. to create a

  200.1.1.1 alias for eth0 ...

    # ifconfig eth0:0 200.1.1.1  etc,etc....

                   ~~ -> request alias #0 creation (if not yet exists) for eth0

    The corresponding route is also set up by this command.

    Please note: The route always points to the base interface.

o Alias deletion.

  The alias is removed by shutting the alias down:

    # ifconfig eth0:0 down

                 ~~~~~~~~~~ -> will delete alias

o Alias (re-)configuring

  Aliases are not real devices, but programs should be able to configure and

  refer to them as usual (ifconfig, route, etc).

o Relationship with main device

  If the base device is shut down the added aliases will be deleted

  too.

Contact

-------

Please finger or e-mail me:

   Juan Jose Ciarlante 

Updated by Erik Schoenfelder 

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